The Best Green Dishwasher Detergent

So, apparently the greenest way to wash dishes is with an efficient dishwasher? Unfortunately, we still do ours by hand (not by choice). So all of you who are lucky enough to live in a home with a dishwasher, you might as well use a green dishwashing detergent ... right? Want to know which is the best? We've got it for you after the jump.